kopia lustrzana https://github.com/pimoroni/pimoroni-pico
84 wiersze
1.8 KiB
Markdown
84 wiersze
1.8 KiB
Markdown
|
# BMP280 <!-- omit in toc -->
|
||
|
|
|
||
|
|
- [Getting Started](#getting-started)
|
||
|
|
- [Reading Temperature & Pressure](#reading-temperature--pressure)
|
||
|
|
- [Configuring The Sensor](#configuring-the-sensor)
|
||
|
|
- [Filter Settings](#filter-settings)
|
||
|
|
- [Oversampling Settings](#oversampling-settings)
|
||
|
|
- [Mode Settings](#mode-settings)
|
||
|
|
- [Standby/Output Data Rate Settings](#standbyoutput-data-rate-settings)
|
||
|
|
- [Defaults](#defaults)
|
||
|
|
|
||
|
|
## Getting Started
|
||
|
|
|
||
|
|
Construct new `PimoroniI2C` and `BreakoutBMP280` instances:
|
||
|
|
|
||
|
|
```python
|
||
|
|
from breakout_bmp280 import BreakoutBMP280
|
||
|
|
from pimoroni_i2c import PimoroniI2C
|
||
|
|
|
||
|
|
PINS_BREAKOUT_GARDEN = {"sda": 4, "scl": 5}
|
||
|
|
PINS_PICO_EXPLORER = {"sda": 20, "scl": 21}
|
||
|
|
|
||
|
|
i2c = PimoroniI2C(**PINS_BREAKOUT_GARDEN)
|
||
|
|
bmp = BreakoutBMP280(i2c)
|
||
|
|
```
|
||
|
|
|
||
|
|
## Reading Temperature & Pressure
|
||
|
|
|
||
|
|
The `read` method will return a tuple containing Temperature (degrees C) and Pressure (Pa) values:
|
||
|
|
|
||
|
|
```python
|
||
|
|
temperature, pressure = bmp.read()
|
||
|
|
```
|
||
|
|
|
||
|
|
## Configuring The Sensor
|
||
|
|
|
||
|
|
The `configure` method allows you to set up the oversampling, filtering and operation mode.
|
||
|
|
|
||
|
|
```python
|
||
|
|
bmp.configure(filter, standby_time, os_pressure, os_temp, mode)
|
||
|
|
```
|
||
|
|
|
||
|
|
The `breakout_bmp280` module includes constants for these:
|
||
|
|
|
||
|
|
### Filter Settings
|
||
|
|
|
||
|
|
* `FILTER_COEFF_OFF`
|
||
|
|
* `FILTER_COEFF_2`
|
||
|
|
* `FILTER_COEFF_4`
|
||
|
|
* `FILTER_COEFF_8`
|
||
|
|
* `FILTER_COEFF_16`
|
||
|
|
|
||
|
|
### Oversampling Settings
|
||
|
|
|
||
|
|
* `NO_OVERSAMPLING`
|
||
|
|
* `OVERSAMPLING_1X`
|
||
|
|
* `OVERSAMPLING_2X`
|
||
|
|
* `OVERSAMPLING_4X`
|
||
|
|
* `OVERSAMPLING_8X`
|
||
|
|
* `OVERSAMPLING_16X`
|
||
|
|
|
||
|
|
### Mode Settings
|
||
|
|
|
||
|
|
* `SLEEP_MODE`
|
||
|
|
* `FORCED_MODE`
|
||
|
|
* `NORMAL_MODE`
|
||
|
|
|
||
|
|
### Standby/Output Data Rate Settings
|
||
|
|
|
||
|
|
* `STANDBY_TIME_0_5_MS`
|
||
|
|
* `STANDBY_TIME_62_5_MS`
|
||
|
|
* `STANDBY_TIME_125_MS`
|
||
|
|
* `STANDBY_TIME_250_MS`
|
||
|
|
* `STANDBY_TIME_500_MS`
|
||
|
|
* `STANDBY_TIME_1000_MS`
|
||
|
|
* `STANDBY_TIME_2000_MS`
|
||
|
|
* `STANDBY_TIME_4000_MS`
|
||
|
|
|
||
|
|
### Defaults
|
||
|
|
|
||
|
|
```python
|
||
|
|
bmp.configure(FILTER_COEFF_2, STANDBY_TIME_1000_MS, OVERSAMPLING_4X, OVERSAMPLING_4X)
|
||
|
|
```
|